Novel belt loop fixing piece and using method thereof

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a novel belt loop fixing piece and a using method thereof.The novel belt loop fixing piece comprises a traction block and a belt loop fixing piece movably connected to one end of the traction block, and a traction hole used for being connected with a traction rope is formed in the surface of the side, away from the belt loop fixing piece, of the traction block; a plurality of first placement grooves are formed in the peripheral side surface of the traction block, the first placement grooves are circumferentially arrayed around the vertical axis of the traction block, abutting blocks are slidably connected into the first placement grooves, one ends of the abutting blocks are arranged in the first placement grooves, and the other ends of the abutting blocks are elastically arranged in the first placement grooves in a penetrating mode; one end, extending out of the first placing groove, of each abutting block is provided with an oblique angle, the belt loop fixing piece is cylindrical, the diameter of the belt loop fixing piece is the same as the inner diameter of the bone tunnel, and the belt loop fixing piece and the traction block are arranged at intervals. And the device cannot be stabilized on the surface of the femur.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a novel loop fastener and its usage method. Background Technology

[0002] Cruciate ligament reconstruction (ACL) is a surgical procedure that replaces a torn or severely damaged cruciate ligament within the knee joint with a new tendon (graft) to restore knee joint stability. It is primarily used to treat anterior cruciate ligament (ACL) or posterior cruciate ligament (PCL) injuries. The procedure typically involves the following steps: 1) Securely suture one end of the graft (e.g., hamstring tendon) to the "loop" of the fixation plate, ensuring they form a single unit; 2) Pass the connected graft, loop, and fixation plate through a pre-drilled bone tunnel (e.g., a femoral side tunnel), allowing the fixation plate to emerge from the other end of the tunnel; 3) Pull on the free end of the loop, causing the fixation plate to unfold outside the tunnel (or at a specific location) and "lock" against the bone surface, similar to a button fastened through a buttonhole, thus achieving mechanical locking. For example, a Chinese patent discloses a fixed titanium plate with loops (patent publication number: CN217430257U). The titanium plate body is a strip-shaped plate structure. The titanium plate body is provided with a first through hole, a second through hole, a third through hole, and a fourth through hole in sequence. The second through hole and the third through hole are adjacent to each other. The first through hole and the fourth through hole are located outside the second through hole and the third through hole, respectively. The loop is annular and passes through the second through hole and the third through hole in sequence. The fixing component includes a first fixing line passing through the first through hole and a second fixing line passing through the fourth through hole. The first fixing line and the second fixing line are used for fixing and installing the titanium plate body.

[0003] While the aforementioned technical solution provides a looped fixation plate, in actual operation, the looped fixation plate needs to be passed through the bone tunnel under the guidance of traction wires. Then, traction ropes are needed to flip the looped fixation plate so that it adheres to the femoral cortex for securing one end of the graft. However, this procedure increases the steps and burden on medical staff. Not only is it necessary to first create a loop to connect the fixation plate to the graft, but two traction ropes also need to be connected to the fixation plate for flipping. Furthermore, the flipped fixation plate only adheres to the femoral surface without being permanently fixed to it. The outer surface of the femur is not a regular plane but an uneven, sloping surface, leading to a risk of plate displacement. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a novel looped fixation device and its method of use, in order to solve the problem that the current looped fixation plates are not only time-consuming and laborious to install, but also cannot be firmly fixed to the femoral surface.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A novel looped fixation device, which is inserted into a bone tunnel via a traction rope, includes a traction block and a looped fixation device movably connected to one end of the traction block. The diameter of the traction block is the same as the inner diameter of the bone tunnel. A traction hole for connecting the traction rope is formed on the surface of the traction block away from the looped fixation device. A plurality of first placement grooves are formed on the peripheral surface of the traction block. Each first placement groove is circumferentially arranged around the vertical axis of the traction block, and an abutment block is slidably connected in each first placement groove. One end of each abutment block is located in the first placement groove, and the other end is elastically inserted through the first placement groove. The end of each abutment block extending out of the first placement groove is beveled. The looped fixation device is cylindrical, and its diameter is the same as the inner diameter of the bone tunnel. The looped fixation device and the traction block are spaced apart, and a fixing rope is connected to the adjacent end faces of the looped fixation device and the traction block. A connection hole is formed on the end face of the looped fixation device away from the traction block.

[0006] Furthermore, the surface of the traction block is slidably provided with a positioning component that moves along its axial direction. The positioning component includes two positioning posts and a fixing block that is fixedly connected to one end of both positioning posts. The two positioning posts are symmetrically arranged about the axis of the traction block, and the end of each positioning post away from the fixing block moves towards the loop fixing component. The surface of the traction block away from the loop fixing component has a second placement groove for placing the fixing block, and the outer surface of the fixing block is detachably connected with a traction rope. The end face of the loop fixing component near the traction block has two positioning holes that cooperate with each positioning post.

[0007] Furthermore, the abutment block is provided in two parts, each corresponding to a positioning post. One end of each abutment block is connected to an elastic element, and each elastic element is set in a corresponding first placement groove. One end of each elastic element is connected to the abutment block, and the other end is connected to the traction block. One end of each positioning post passes through the corresponding first placement groove, and the surface of each abutment block is provided with a slot that matches the peripheral surface of the positioning post.

[0008] Furthermore, two third placement slots are provided on the peripheral surface of the traction block, and an auxiliary abutment block is slidably inserted in each third placement slot. Each auxiliary abutment block corresponds to an abutment block. Each abutment block has a wedge-shaped block on its outer surface that abuts against the outer surface of the auxiliary abutment block. The movement direction of the auxiliary abutment block and the movement direction of the corresponding abutment block are perpendicular to each other in the same plane.

[0009] Furthermore, the loop fastener includes a cylindrical positioning part and a frustum-shaped connecting part, with the connecting part located on the end face of the positioning part away from the traction block. The connecting part is coaxially arranged with the positioning part, and the diameter of the connecting part gradually decreases in the direction away from the positioning part. The connecting hole is arranged along the radial direction of the connecting part, and the connecting hole simultaneously penetrates the peripheral surface and adjacent end face of the connecting part. The end face of the connecting part away from the traction block is detachably connected to a limit block.

[0010] Furthermore, the loop fastener and the limiting block are made of biodegradable materials, while the traction block, the abutment block, and the auxiliary abutment block are all made of metal materials.

[0011] A method for using a novel loop fastener, comprising the following steps: Step S1: Clean and inspect the overall structure and components of the loop fixation device. Select a suitable graft according to the patient's condition, trim it to the appropriate length, and ensure that the connection end with the loop is flat to provide a stable foundation for subsequent suturing and fixation. Step S2: Connect the loop to the graft and place the loop in the connection hole. Fix the limiting block to the end face of the loop fixation part of the connection through threaded connection to form an axial limit on the loop and prevent it from falling off or shifting during the traction process during the operation. Cooperate the positioning part with the traction block and wrap the traction rope around the traction hole multiple times to fix the fixation part and the traction block to each other. Then connect the traction rope to the pull ring on the outer surface of the fixation block. Step S3: After passing the free ends of the traction rope and the pull rope through the bone tunnels of the femur and ligament in sequence, the traction of the graft begins. At the same time, the medical staff pulls the free ends of the traction rope and the pull rope until the traction block is completely out of the femoral tunnel. At this time, the loop fixation device is located in the femoral side bone tunnel, and the main body of the graft is distributed along the bone tunnel. Step S4: First, remove the traction rope and disconnect the connection between the traction rope and the traction block. Then, pull the traction rope to separate the fixation piece from the traction block. The elastic piece returns to its original shape and releases elastic potential energy, pushing the abutment block outward along the first placement groove and the auxiliary abutment block outward along the third placement groove. Finally, the abutment block and the auxiliary abutment block together form a multi-directional abutment structure, firmly adhering to the outer surface of the femur. Step S5: Medical staff pull the end of the graft away from the loop fixation device and apply appropriate tension to the tibial side to maintain the preset tension of the graft. Under the action of tension, the traction block is tightly attached to the outer surface of the femur by the action of the abutment block and the auxiliary abutment block. Finally, bone screws or other existing components are used to fix the other end of the graft away from the loop fixation device.

[0012] The beneficial effects of this invention are as follows: 1. This invention achieves a double leap in both the simplification of surgical procedures and the reliability of fixation through its integrated structure and intelligent traction anchoring mechanism. It integrates the traction block and the looped fixation component into a single system, which not only completely eliminates the most troublesome "intracavitary flipping" step in traditional looped titanium plate surgery, but also simplifies the traction system and reduces the cumbersome process of threading and managing multiple traction ropes during surgery, thereby significantly improving surgical efficiency and reducing operational difficulty. 2. Furthermore, the interaction between the abutment block and the fixation component provides a dual guarantee of "internal and external integration." Externally, the elastic abutment block built into the traction block automatically pops out after passing through the bone tunnel as the fixation component disengages, forming a multi-dimensional "claw-shaped" structure with the auxiliary abutment block, closely fitting the outer surface of the femur. Internally, the precisely matched diameter loop fixation component acts like a built-in expansion plug, closely fitting the inner wall of the bone tunnel under the action of the fixation rope and the tension of the graft, effectively suppressing the micromovement and "pendulum" effect of the graft, creating an extremely stable mechanical environment for the early healing of the graft and the bone tunnel.

[0013] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0014] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration: Figure 1 This is a schematic diagram of the overall structure of the traction block and the loop fastener of the present invention; Figure 2 This is a side view of the overall structure of the traction block and the loop fastener of the present invention; Figure 3 For the present invention Figure 2 Sectional view at point AA; Figure 4 This is an exploded view of the traction block and the loop fastener of the present invention. Figure 5 This is a schematic diagram showing the connection between the traction block and the traction rope and pull rope of the present invention; Figure 6 This is a schematic diagram of the traction block and loop fixation component of the present invention in the bone tunnel.

[0015] The following labels are shown in the attached diagram: 1. Traction block, 2. Loop fastener, 201. Positioning part, 202. Connecting part, 3. Traction hole, 4. Traction rope, 5. First placement slot, 6. Abutment block, 7. Fixing rope, 8. Connecting hole, 9. Loop ring, 10. Positioning post, 11. Fixing block, 12. Second placement slot, 13. Pulling rope, 14. Positioning hole, 15. Elastic element, 16. Third placement slot, 17. Auxiliary abutment block, 18. Limiting block, 19. Graft. Detailed Implementation

[0016] like Figures 1-6 As shown, A novel looped fixation device, inserted into a bone tunnel via a traction rope 4, includes a traction block 1 and a looped fixation device 2 movably connected to one end of the traction block 1. The diameter of the traction block 1 is the same as the inner diameter of the bone tunnel. The traction block 1 is hemispherical. A traction hole 3 for connecting the traction rope 4 is formed on the surface of the traction block 1 away from the looped fixation device 2. The length direction of the traction hole 3 is perpendicular to the axial direction of the traction block 1. Multiple first placement grooves 5 are formed on the peripheral surface of the traction block 1. Each first placement groove 5 is circumferentially arranged around the vertical axis of the traction block 1, and each first placement groove 5 contains... Each abutment block 6 is slidably connected to abutment blocks 6. One end of each abutment block 6 is located in the first placement groove 5, and the other end is elastically inserted through the first placement groove 5. The end of each abutment block 6 extending out of the first placement groove 5 is set at an oblique angle. The loop fastener 2 is cylindrical, and the diameter of the loop fastener 2 is the same as the inner diameter of the bone tunnel. The loop fastener 2 and the traction block 1 are spaced apart. The two adjacent end faces of the loop fastener 2 and the traction block 1 are connected to a fixing rope 7. The end face of the loop fastener 2 away from the traction block 1 is provided with a connecting hole 8, and the loop fastener 2 is connected to a loop ring 9 through the connecting hole 8.

[0017] As shown in the figure, before the graft 19 needs to be pulled into the bone tunnel, the loop fixation member 2 and the graft 19 are first connected by the loop 9. One end of the loop 9 passes through the connecting hole 8 and the graft 19 and is then sutured into a ring structure (the weaving of the loop 9 and its connection with the graft 19 are common knowledge to those skilled in the art and will not be described in detail here). After the loop fixation member 2 and the graft 19 are connected, the connection between the traction block 1 and the traction rope 4 begins. One end of the traction rope 4 is passed through the bone tunnels of the femur and tibia in sequence, and then continues to pass through... After passing through traction hole 3, it returns along the same path and together with the other end of traction rope 4 forms the traction end; then traction of graft 19 begins, indirectly pulling traction block 1, loop fixation member 2, and graft 19 into the bone tunnel by pulling the traction end. Since one end of the abutment blocks 6 around traction block 1 is set at an oblique angle, during traction, each abutment block 6 is positioned in the placement groove under the action of the inner wall of the bone tunnel; when traction block 1 passes through the bone tunnel of the femur, traction is stopped. At this time, one end of each abutment block 6 extends a certain distance beyond the abutment block 6; then pull... The end of the implant 19 furthest from the looped traction block 1 allows one side surface of each abutment block 6 to abut against the outer surface of the femur while simultaneously applying a certain tension to the implant 19. Since the traction block 1 and the looped fixation member 2 are connected by a fixing rope 7, and the traction block 1 and looped fixation member 2 at both ends of the fixing rope 7 possess high flexibility, the traction block 1 can fit tightly against the outer surface of the femur under the action of each abutment block 6. The diameter of the looped fixation member 2 is the same as the inner diameter of the bone tunnel, allowing it to be fixed to the bone under the action of the fixing rope 7 and the implant 19. Inside the tunnel, the slippage of one end of the graft 19 is effectively prevented, and the fixation of one end of the graft 19 is completed. The traction block 1 and the abutment block 6 work together to achieve a stable anchoring effect on one end of the graft 19. Combined with the cooperation of the loop fixation member 2 and the bone tunnel, the shaking of the graft 19 is effectively prevented, thereby achieving effective fixation of one end of the graft 19. Then the traction rope 4 is removed, and the other end of the graft 19 is fixed (by bone screws or other existing technologies known to those skilled in the art, which will not be elaborated here).

[0018] This solution is an improvement over the current construction methods and processes for looped titanium plates. It not only eliminates the need to flip the looped titanium plates but also reduces the number of traction ropes 4 used to pull the looped titanium plates, thus improving work efficiency. At the same time, by anchoring the graft 19 through the traction block 1 and cooperating with the looped fixing component 2 in conjunction with the bone tunnel, the graft 19 can be stabilized, effectively preventing it from shaking and improving the stability of the graft 19.

[0019] In this embodiment, a positioning element that moves along its axis is slidably passed through the surface of the traction block 1. The positioning element includes two positioning posts 10 and a fixing block 11 that is fixedly connected to one end of the two positioning posts 10. The two positioning posts 10 are symmetrically arranged about the axis of the traction block 1, and the end of each positioning post 10 away from the fixing block 11 moves toward the loop fixing element 2. A second placement groove 12 for placing the fixing block 11 is opened on the side surface of the traction block 1 away from the loop fixing element 2. The shape of the fixing block 11 is the same as the shape of the second placement groove 12. A pull ring is fixedly connected to the outer surface of the fixing block 11, and a pull rope 13 is detachably connected to the fixing block 11 through the pull ring. Two positioning holes 14 that cooperate with one end of each positioning post 10 are opened on the end face of the loop fixing element 2 near the traction block 1. The length direction of the fixing block 11 is perpendicular to the axial direction of the traction hole 3 in space.

[0020] As shown in the diagram, since the traction block 1 and the loop fixation member 2 are connected by the fixing rope 7, they will swing relative to each other during the traction process, which increases the difficulty of traction (because there is a gap between the tibia and femur). Therefore, the traction block 1 and the loop fixation member 2 are first fixedly connected by the positioning member to prevent relative swaying when they enter the tibia and pass through the gap between the tibia and femur. Since one end of the two positioning posts 10 is located inside the traction block 1 and the other end is engaged with the positioning hole 14, the horizontal freedom of the two can be restricted to a certain extent. The fixing block 11 is connected to the traction rope 13 through the pull ring. The traction rope 4 passes through the pull ring and the traction hole 3 and is wrapped several times (the specific wrapping method can be found in the reference). Figure 5 As shown in the diagram, for ease of demonstration, the traction rope 4 is a solid line and the pull rope 13 is a dashed line. This effectively secures the fixing block 11 to the traction block 1, ensuring that the positioning component will not detach from the traction block 1 and the looped fixing component 2 during traction. After the traction block 1 passes through the femoral tunnel, the traction rope 4 is removed first, and then the pull rope 13 is pulled to detach the positioning component from the traction block 1 and the looped fixing component 2. This allows the two positioning posts 10 to no longer restrict the freedom of the traction block 1 and the looped fixing component 2, ensuring that the traction block 1 can be firmly fixed to the outer surface of the femur by the abutment block 6.

[0021] In this embodiment, the abutment block 6 has two parts, each corresponding to a positioning post 10. One end of each abutment block 6 is connected to an elastic element 15. The elastic element 15 is made of a metal material with a certain elastic deformation and is "V" shaped. Each elastic element 15 is set in a corresponding first placement groove 5. One end of each elastic element 15 is connected to the abutment block 6 and the other end is connected to the traction block 1. One end of each positioning post 10 passes through the corresponding first placement groove 5. The surface of each abutment block 6 is provided with a slot that matches the peripheral surface of the positioning post 10.

[0022] As shown in the figure, when the positioning element is located in the second placement groove 12, each abutment block 6 is engaged with the outer surface of the adjacent positioning post 10 through the slot, restricting the abutment block 6 and placing it in the first placement groove 5. At this time, each elastic element 15 is compressed and accumulates elastic potential energy. After the traction block 1 passes through the femoral tunnel and the positioning element is removed, each positioning post 10 is no longer engaged with the abutment block 6. The elastic element 15 returns to its original state and releases elastic potential energy, pushing the corresponding abutment block 6 to move, so that one end of each abutment block 6 extends out of the first placement groove 5 and abuts against the outer surface of the femur.

[0023] When the traction block 1 moves along the bone tunnel under the drive of the traction rope 4, each abutment block 6 is located in the first placement groove 5, which effectively avoids friction between one end of the abutment block 6 and the inner wall of the bone tunnel, and improves the smoothness of the movement of the traction block 1; at the same time, it can also reduce the resistance when the traction block 1 is pulled into the bone tunnel, and improve the efficiency of traction.

[0024] In this embodiment, two third placement grooves 16 are formed on the peripheral surface of the traction block 1, and an auxiliary abutment block 17 is slidably inserted in each third placement groove 16. Each auxiliary abutment block 17 corresponds to an abutment block 6. The outer surface of each abutment block 6 is provided with a wedge-shaped block that abuts against the outer surface of the auxiliary abutment block 17. The movement direction of the auxiliary abutment block 17 is perpendicular to the movement direction of the corresponding abutment block 6 in the same plane.

[0025] As shown in the figure, when the abutment block 6 is no longer engaged with the positioning post 10, each abutment block 6 moves along its length under the action of the elastic element 15. Since the outer surface of the abutment block 6 is provided with a wedge-shaped block that abuts against the outer surface of the auxiliary abutment block 17, during the movement of the abutment block 6, the corresponding auxiliary abutment block 17 is also moved along its length through the wedge-shaped block. Under the cooperation of the wedge-shaped block, the movement directions of the abutment block 6 and the corresponding auxiliary abutment block 17 are perpendicular to each other on the horizontal plane. One end of each auxiliary abutment block 17 extends out of the traction block 1 under the action of the wedge-shaped block and cooperates with the abutment block 6 to abut against the outer surface of the femur, effectively improving the abutment strength between the traction block 1 and the outer surface of the femur.

[0026] In this embodiment, the loop fastener 2 includes a cylindrical positioning part 201 and a frustum-shaped connecting part 202. The connecting part 202 is disposed on the end face of the positioning part 201 away from the traction block 1. The diameter of the positioning part 201 is the same as the inner diameter of the bone tunnel. The connecting part 202 is coaxially disposed with the positioning part 201, and the diameter of the connecting part 202 gradually decreases in the direction away from the positioning part 201. The connecting hole 8 is disposed along the radial direction of the connecting part 202, and the connecting hole 8 penetrates both the peripheral surface and the adjacent end face of the connecting part 202. The end face of the connecting part 202 away from the traction block 1 is detachably connected to the limiting block 18 by a thread.

[0027] As shown in the figure, when the loop fixation member 2 is located inside the bone tunnel, the outer surface of the positioning part 201 is in close contact with the inner wall of the bone tunnel, effectively preventing the graft 19 from shaking. The connecting part 202 is threadedly connected to the limiting block 18, allowing the limiting block 18 to be quickly disassembled. The loop ring 9 is accommodated through the connecting hole 8 penetrating the outer surface of the connecting part 202. Then, the limiting block 18 and the connecting part 202 are fixed, realizing the quick connection between the loop ring 9 and the connecting part 202, effectively saving the time of connecting the loop ring 9. Furthermore, the gradually decreasing diameter of the connecting part 202 can provide a space for the loop ring 9, effectively preventing the loop ring 9 from rubbing against the inner wall of the bone tunnel during the traction process of the traction block 1, effectively ensuring the normal operation of the traction block 1.

[0028] In this embodiment, the loop fastener 2 and the limiting block 18 are both made of biodegradable materials (e.g., polylactic acid, polyglycolic acid and their copolymers), the traction block 1, the abutment block 6, the auxiliary abutment block 17 and the elastic element 15 are all made of metal materials (e.g., titanium alloy), and the fixing rope 7 and the loop 9 are made of the same material (e.g., titanium alloy).

[0029] Several months after the surgery, the graft 19 and the bone tunnel complete osseointegration, forming a strong bone-graft 19 complex. The fixation and limiting components degrade into carbon dioxide and water, which can be metabolized and excreted by the human body. The traction block 1, abutment block 6, auxiliary abutment block 17, and fixation rope 7 maintain their shape and ensure the tension of the graft 19. The newly formed bone will surround and fix the traction block 1 and other components, further enhancing the fixation effect on the traction block 1.

[0030] A method of using a novel loop fastener 2, which is applied to the novel loop fastener 2, includes the following implementation steps; Step S1: Component and material inspection and compatibility confirmation. Clean and inspect the overall structure and components of the loop fixation member 2, and confirm that the diameters of the traction block 1 and the loop fixation member 2 are completely matched with the inner diameters of the femoral and tibial bone tunnels (to avoid gaps that could cause wobbling). Check that the abutment block 6 and the auxiliary abutment block 17 slide smoothly in the first / third placement groove 16, and that the elastic element 15 is not deformed (to ensure that elastic potential energy can be released normally after surgery). Verify that the threaded fit between the limiting block 18 and the connecting part 202 of the loop fixation member 2 is tight (for easy disassembly and assembly). Pretreatment of graft 19: Select an appropriate graft 19 (autologous / allogeneic tendon) according to the patient's condition, trim it to the appropriate length, and ensure that the connection end with the loop 9 is flat to provide a stable foundation for subsequent suturing and fixation; Step S2: Pre-connection of the loop fixation member 2 and the graft 19. The loop 9 is sutured into a ring structure using medical suture techniques and connected to the graft 19 (the suture strength must match the tension requirements during knee joint movement to ensure that the graft 19 and the loop fixation member 2 form a strong whole). At the same time, the loop 9 is placed in the connecting hole 8. The limiting block 18 is fixed to the end face of the connecting part 202 of the loop fixation member 2 by threaded connection to form an axial limit on the loop 9 and prevent it from falling off or shifting during intraoperative traction. The positioning component is engaged with the traction block 1 to ensure that each positioning post 10 and the abutment block 6 are engaged with each other, and each elastic component 15 is kept in a compressed state; then the traction rope 4 is wound around the traction hole 3 multiple times to fix the fixing component and the traction block 1, and then the pull rope 13 is connected to the pull ring on the outer surface of the fixing block 11. Step S3: After passing the free ends of traction rope 4 and traction rope 13 through the bone tunnels of the tendon and femur in sequence, the traction graft 19 is then pulled. At the same time, the medical staff pulls the free ends of traction rope 4 and traction rope 13 until the traction block 1 is completely passed through the femoral tunnel. At this time, the loop fixation piece 2 is located in the femoral side bone tunnel, and the main body of the graft 19 is distributed along the bone tunnel. Step S4: First, remove the traction rope 4 and disconnect the connection between the traction rope 4 and the traction block 1. Then, pull the traction rope 13 to separate the fixing member from the traction block 1. The positioning post 10 disengages from the slot of the abutment block 6, releasing the limitation on the abutment block 6. The elastic member 15 returns to its original state and releases elastic potential energy, pushing the abutment block 6 outward along the first placement groove 5. When the abutment block 6 moves, the wedge-shaped block on its outer surface squeezes the auxiliary abutment block 17. Since the two move in the same plane and are perpendicular, the auxiliary abutment block 17 extends outward along the third placement groove 16. Finally, the abutment block 6 and the auxiliary abutment block 17 together form a "multi-directional abutment" structure, firmly adhering to the outer surface of the femur (increasing the anchoring strength and preventing the traction block 1 from shifting). Step S5: Medical staff pull the end of graft 19 away from the loop fixation component 2 and apply appropriate tension to the tibial side to maintain the graft 19 at the preset tension (simulating the tension state of the original cruciate ligament to ensure joint stability). Under the action of tension, the traction block 1 is tightly attached to the outer surface of the femur by the abutment action of the abutment block 6 and the auxiliary abutment block 17. The positioning part 201 of the loop fixation component 2 is firmly fixed in the femoral bone tunnel under the combined action of the fixation rope 7 and the tension of the graft 19 because its diameter matches the bone tunnel, effectively preventing one end of the graft 19 from sliding. Finally, bone nails or other existing components are used to fix the other end of the graft 19.

[0031] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A new type of looped fixation device, which is passed through a bone tunnel by a traction rope (4), comprising a traction block (1) and a looped fixation device (2) movably connected to one end of the traction block (1), characterized in that: The diameter of the traction block (1) is the same as the inner diameter of the bone tunnel, a traction hole (3) for connecting a traction rope (4) is arranged on the surface of the traction block (1) away from the looped fixing part (2), and a plurality of first placing grooves (5) are arranged on the circumferential surface of the traction block (1), the first placing grooves (5) are arranged in a circumferential array around the vertical axis of the traction block (1), and each first placing groove (5) is slidably connected with an abutting block (6), one end of each abutting block (6) is arranged in the first placing groove (5), the other end is elastically arranged in the first placing groove (5), and the end of each abutting block (6) extending out of the first placing groove (5) is arranged at an inclined angle; the looped fixing part (2) is in a cylindrical shape, the diameter of the looped fixing part (2) is the same as the inner diameter of the bone tunnel, the looped fixing part (2) is arranged in a spaced manner with the traction block (1), and the two end faces of the looped fixing part (2) and the traction block (1) are connected with a fixed rope (7), and a connecting hole (8) is arranged on the end face of the looped fixing part (2) away from the traction block (1).

2. A novel loop fixation device according to claim 1, characterized in that: The surface of the traction block (1) is slidably arranged with a positioning member moving along the axial direction thereof, the positioning member comprises two positioning columns (10) and a fixed block (11) fixedly connected with one end of the two positioning columns (10), the two positioning columns (10) are symmetrically arranged about the axis of the traction block (1), and one end of each positioning column (10) moves towards the looped fixing part (2), a second placing groove (12) for placing the fixed block (11) is arranged on the surface of the traction block (1) away from the looped fixing part (2), and the outer surface of the fixed block (11) is detachably connected with a traction rope (13), and the end face of the looped fixing part (2) close to the traction block (1) is arranged with two positioning holes (14) matched with the positioning columns (10).

3. A novel loop fixation device according to claim 2, characterized in that: The abutting block (6) is provided with two parts and corresponds to the positioning column (10) one by one, and one end of each abutting block (6) is connected with an elastic member (15), each elastic member (15) is arranged in the corresponding first placing groove (5), one end of each elastic member (15) is connected with the abutting block (6), and the other end is connected with the traction block (1), one end of each positioning column (10) passes through the corresponding first placing groove (5), and the surface of each abutting block (6) is arranged with a clamping groove matched with the circumferential surface of the positioning column (10).

4. A novel loop fixation device according to claim 3, characterized in that: The circumferential surface of the traction block (1) is arranged with two third placing grooves (16), and each third placing groove (16) is slidably arranged with an auxiliary abutting block (17), each auxiliary abutting block (17) corresponds to the abutting block (6) one by one, the outer surface of each abutting block (6) is arranged with a wedge-shaped block abutting against the outer surface of the auxiliary abutting block (17), and the movement direction of the auxiliary abutting block (17) is perpendicular to the movement direction of the corresponding abutting block (6) in the same plane.

5. A novel loop fixation device according to claim 4, characterized in that: The band loop fixing part (2) comprises a positioning part (201) in a cylindrical shape and a connecting part (202) in a circular truncated cone shape, the connecting part (202) is arranged on an end face of the positioning part (201) away from the traction block (1), the connecting part (202) is coaxially arranged with the positioning part (201), and the diameter of the connecting part (202) gradually decreases away from the positioning part (201), the connecting hole (8) is arranged in the radial direction of the connecting part (202), and the connecting hole (8) penetrates through the peripheral surface and the adjacent end face of the connecting part (202) at the same time, and the end face of the connecting part (202) away from the traction block (1) is detachably connected with the limiting block (18).

6. A novel loop fixation device according to claim 5, characterized in that: The band loop fixing part (2) and the limiting block (18) are made of biodegradable materials, and the traction block (1), the abutting block (6) and the auxiliary abutting block (17) are made of metal materials.

7. A method of using a new type of looped fastener, which is applied to the new type of looped fastener as claimed in claims 1-6, characterized in that: The following implementation steps are included, Step S1, clean and check the overall structure of the band loop fixing part (2) and each component, select the appropriate graft (19) according to the patient's condition, trim to the appropriate length to ensure that the connecting end of the loop ring (9) is flat, and provide a stable foundation for subsequent suture fixation; Step S2, connect the loop ring (9) with the graft (19), place the loop ring (9) in the connecting hole (8), and fix the limiting block (18) on the end face of the connecting part (202) of the band loop fixing part (2) through screw connection, which forms axial limiting for the loop ring (9) and prevents it from falling off or shifting during traction in the operation; the positioning part is matched with the traction block (1), the traction rope (4) is wound around the traction hole (3) multiple times, so that the fixing part and the traction block (1) are fixed with each other, and then the traction rope (13) is connected with the pull ring on the outer surface of the fixing block (11); Step S3, after the free ends of the traction rope (4) and the traction rope (13) pass through the bone tunnel of the muscle and bone in sequence, the graft (19) is immediately pulled; the medical staff pull the free ends of the traction rope (4) and the traction rope (13) at the same time, until the traction block (1) completely passes out of the femoral tunnel, at this time the band loop fixing part (2) is located in the femoral tunnel, and the main body of the graft (19) is distributed along the bone tunnel; Step S4, first remove the traction rope (4), disconnect the traction rope (4) and the traction block (1), then pull the traction rope (13) to separate the fixing part and the traction block (1), the elastic member (15) restores to its original state and releases the elastic potential energy, pushes the abutting block (6) to stretch out along the first placement groove (5), and the auxiliary abutting block (17) stretches out along the third placement groove (16), and finally the abutting block (6) and the auxiliary abutting block (17) form a multi-directional abutting structure together, firmly adhering to the outer surface of the femur; Step S5, the medical staff pulls the graft (19) away from one end of the looped fixing member (2), applies moderate tension to the tibial side, so that the graft (19) maintains the preset tension, under the action of the tension, the traction block (1) is tightly attached to the outer surface of the femur under the abutting action of the abutting block (6) and the auxiliary abutting block (17), and finally the other end of the graft (19) away from the looped fixing member (2) is fixed by using a bone screw or other existing components.

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